ROME (AP) — Former No. 1 Caroline Wozniacki was upset in the first round of the Italian Open by 48th-ranked Bojana Jovanovski 2-6, 6-4, 7-6 (7-5) Tuesday.

Wozniacki wasted a 5-2 lead in the third-set tiebreaker. The Dane has struggled on clay this season, losing to Yaroslava Shvedova in the first round of last week's Madrid Open and to Carla Suarez Navarro in her first match in Stuttgart, Germany, last month.

American Sloane Stephens ended a skid with a 6-3, 6-3 victory against Flavia Pennetta of Italy. Stephens had lost four consecutive matches.

On the men's side, world No. 1 Novak Djokovic of Serbia advanced comfortably with a 6-2, 6-3 victory against Albert Montanes of Spain.